Failed to flush outgoing items {:outgoing_count=>2, :exception=>#<NameError: no method 'type' for arguments (org.jruby.RubyArray) on Java::OrgElasticsearchActionIndex::IndexRequest>, :backtrace=>["/opt/logstash/lib/logstash/outputs/elasticsearch/protocol.rb:225:in `build_request'", "/opt/logstash/lib/logstash/outputs/elasticsearch/protocol.rb:205:in `bulk'", "org/jruby/RubyArray.java:1613:in `each'", "/opt/logstash/lib/logstash/outputs/elasticsearch/protocol.rb:204:in `bulk'", "/opt/logstash/lib/logstash/outputs/elasticsearch.rb:315:in `flush'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:219:in `buffer_flush'", "org/jruby/RubyHash.java:1339:in `each'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:216:in `buffer_flush'", "/opt/logstash/lib/logstash/outputs/elasticsearch.rb:324:in `teardown'", "org/jruby/RubyArray.java:1613:in `each'", "/opt/logstash/lib/logstash/pipeline.rb:227:in `outputworker'", "/opt/logstash/lib/logstash/pipeline.rb:152:in `start_outputs'"], :level=>:warn}